
<template>
    <div class="design-container">
        <div class="left-board">
            <div class="logo-wrapper">
                <div class="logo">
                    <img :src="logo" alt="logo"> Form Generator
                    <a class="github" href="https://github.com/JakHuang/form-generator" target="_blank">
                        <img src="https://github.githubassets.com/pinned-octocat.svg" alt>
                    </a>
                </div>
            </div>
            <el-scrollbar class="left-scrollbar">
                <div class="components-list">
                    <div v-for="(item, listIndex) in leftComponents" :key="listIndex">
                        <div class="components-title">
                            <svg-icon icon-class="component" />
                            {{ item.title }}
                        </div>
                        <draggable
                                class="components-draggable"
                                :list="item.list"
                                :group="{ name: 'componentsGroup', pull: 'clone', put: false }"
                                :clone="cloneComponent"
                                draggable=".components-item"
                                :sort="false"
                                @end="onEnd"
                        >
                            <div
                                    v-for="(element, index) in item.list"
                                    :key="index"
                                    class="components-item"
                                    @click="addComponent(element)"
                            >
                                <div class="components-body">
                                    <svg-icon :icon-class="element.__config__.tagIcon" />
                                    {{ element.__config__.label }}
                                </div>
                            </div>
                        </draggable>
                    </div>
                </div>
            </el-scrollbar>
        </div>

        <div class="center-board">
            <div class="action-bar">
                <el-button icon="el-icon-video-play" type="text" @click="run">
                    运行
                </el-button>
                <el-button icon="el-icon-view" type="text" @click="showJson">
                    查看json
                </el-button>
                <el-button icon="el-icon-download" type="text" @click="download">
                    导出vue文件
                </el-button>
                <el-button class="copy-btn-main" icon="el-icon-document-copy" type="text" @click="copy">
                    复制代码
                </el-button>
                <el-button class="delete-btn" icon="el-icon-delete" type="text" @click="empty">
                    清空
                </el-button>
            </div>
            <el-scrollbar class="center-scrollbar">
                <el-row class="center-board-row" :gutter="formConf.gutter">
                    <el-form
                            :size="formConf.size"
                            :label-position="formConf.labelPosition"
                            :disabled="formConf.disabled"
                            :label-width="formConf.labelWidth + 'px'"
                    >
                        <draggable class="drawing-board" :list="drawingList" :animation="340" group="componentsGroup">
                            <draggable-item
                                    v-for="(element, index) in drawingList"
                                    :key="element.renderKey"
                                    :drawing-list="drawingList"
                                    :element="element"
                                    :index="index"
                                    :active-id="activeId"
                                    :form-conf="formConf"
                                    @activeItem="activeFormItem"
                                    @copyItem="drawingItemCopy"
                                    @deleteItem="drawingItemDelete"
                            />
                        </draggable>
                        <div v-show="!drawingList.length" class="empty-info">
                            从左侧拖入或点选组件进行表单设计
                        </div>
                    </el-form>
                </el-row>
            </el-scrollbar>
        </div>

        <right-panel
                :active-data="activeData"
                :form-conf="formConf"
                :show-field="!!drawingList.length"
                @tag-change="tagChange"
        />

        <form-drawer
                :visible.sync="drawerVisible"
                :form-data="formData"
                size="100%"
                :generate-conf="generateConf"
        />
        <json-drawer
                size="60%"
                :visible.sync="jsonDrawerVisible"
                :json-str="JSON.stringify(formData)"
                @refresh="refreshJson"
        />
        <code-type-dialog
                :visible.sync="dialogVisible"
                title="选择生成类型"
                :show-file-name="showFileName"
                @confirm="generate"
        />
        <input id="copyNode" type="hidden">
    </div>
</template>

<script>

    import Vue from 'vue'
    import './designFormTools/styles/index.scss'
    import './designFormTools/icons'
    import Tinymce from './designFormTools/tinymce'
    Vue.component('tinymce', Tinymce)

    import draggable from 'vuedraggable'
    import { debounce } from '30-seconds-of-code'
    import { saveAs } from 'file-saver'
    import ClipboardJS from 'clipboard'
    import render from './designFormTools/render/render'
    import FormDrawer from './designFormTools/FormDrawer'
    import JsonDrawer from './designFormTools/JsonDrawer'
    import RightPanel from './designFormTools/RightPanel'
    import {
        inputComponents, selectComponents, layoutComponents, formConf
    } from './designFormTools/generator/config'
    import {
        exportDefault, beautifierConf, isNumberStr, titleCase
    } from './designFormTools/utils/index'
    import {
        makeUpHtml, vueTemplate, vueScript, cssStyle
    } from './designFormTools/generator/html'
    import { makeUpJs } from './designFormTools/generator/js'
    import { makeUpCss } from './designFormTools/generator/css'
    import drawingDefalut from './designFormTools/generator/drawingDefalut'
    import logo from '@/assets/form-design-logo.png'
    import CodeTypeDialog from './designFormTools/CodeTypeDialog'
    import DraggableItem from './designFormTools/DraggableItem'
    import {
        getDrawingList, saveDrawingList, getIdGlobal, saveIdGlobal, getFormConf
    } from './designFormTools/utils/db'
    import loadBeautifier from './designFormTools/utils/loadBeautifier'

    let beautifier
    const emptyActiveData = { style: {}, autosize: {} }
    let oldActiveId
    let tempActiveData
    const drawingListInDB = getDrawingList()
    const formConfInDB = getFormConf()
    const idGlobal = getIdGlobal()

    export default {
        name : 'DesignFormList',
        components: {
            draggable,
            render,
            FormDrawer,
            JsonDrawer,
            RightPanel,
            CodeTypeDialog,
            DraggableItem
        },
        data() {
            return {
                logo,
                idGlobal,
                formConf,
                inputComponents,
                selectComponents,
                layoutComponents,
                labelWidth: 100,
                drawingList: drawingDefalut,
                drawingData: {},
                activeId: drawingDefalut[0].formId,
                drawerVisible: false,
                formData: {},
                dialogVisible: false,
                jsonDrawerVisible: false,
                generateConf: null,
                showFileName: false,
                activeData: drawingDefalut[0],
                saveDrawingListDebounce: debounce(saveDrawingList,340),
                saveIdGlobalDebounce: debounce(saveIdGlobal,340),
                leftComponents: [
                    {
                        title: '输入型组件',
                        list: inputComponents
                    },
                    {
                        title: '选择型组件',
                        list: selectComponents
                    },
                    {
                        title: '布局型组件',
                        list: layoutComponents
                    }
                ]
            }
        },
        computed: {
        },
        watch: {
            // eslint-disable-next-line func-names
            'activeData.__config__.label': function (val, oldVal) {
                if (
                    this.activeData.placeholder === undefined
                    || !this.activeData.__config__.tag
                    || oldActiveId !== this.activeId
                ) {
                    return
                }
                this.activeData.placeholder = this.activeData.placeholder.replace(oldVal, '') + val
            },
            activeId: {
                handler(val) {
                    oldActiveId = val
                },
                immediate: true
            },
            drawingList: {
                handler(val) {
                    this.saveDrawingListDebounce(val)
                    if (val.length === 0) this.idGlobal = 100
                },
                deep: true
            },
            idGlobal: {
                handler(val) {
                    this.saveIdGlobalDebounce(val)
                },
                immediate: true
            }
        },
        mounted() {
            if (Array.isArray(drawingListInDB) && drawingListInDB.length > 0) {
                this.drawingList = drawingListInDB
            } else {
                this.drawingList = drawingDefalut
            }
            this.activeFormItem(this.drawingList[0])
            if (formConfInDB) {
                this.formConf = formConfInDB
            }
            loadBeautifier(btf => {
                beautifier = btf
            })
            const clipboard = new ClipboardJS('#copyNode', {
                text: trigger => {
                    const codeStr = this.generateCode()
                    this.$notify({
                        title: '成功',
                        message: '代码已复制到剪切板，可粘贴。',
                        type: 'success'
                    })
                    return codeStr
                }
            })
            clipboard.on('error', e => {
                this.$message.error('代码复制失败')
            })
        },
        methods: {
            activeFormItem(element) {
                this.activeData = element
                this.activeId = element.__config__.formId
            },
            onEnd(obj) {
                if (obj.from !== obj.to) {
                    this.activeData = tempActiveData
                    this.activeId = this.idGlobal
                }
            },
            addComponent(item) {
                const clone = this.cloneComponent(item)
                this.drawingList.push(clone)
                this.activeFormItem(clone)
            },
            cloneComponent(origin) {
                const clone = JSON.parse(JSON.stringify(origin))
                const config = clone.__config__
                config.formId = ++this.idGlobal
                config.span = this.formConf.span
                config.renderKey = +new Date() // 改变renderKey后可以实现强制更新组件
                if (config.layout === 'colFormItem') {
                    clone.__vModel__ = `field${this.idGlobal}`
                    clone.placeholder !== undefined && (clone.placeholder += config.label)
                } else if (config.layout === 'rowFormItem') {
                    config.componentName = `row${this.idGlobal}`
                    config.gutter = this.formConf.gutter
                }
                tempActiveData = clone
                return tempActiveData
            },
            AssembleFormData() {
                this.formData = {
                    fields: JSON.parse(JSON.stringify(this.drawingList)),
                    ...this.formConf
                }
            },
            generate(data) {
                const func = this[`exec${titleCase(this.operationType)}`]
                this.generateConf = data
                func && func(data)
            },
            execRun(data) {
                this.AssembleFormData()
                this.drawerVisible = true
            },
            execDownload(data) {
                const codeStr = this.generateCode()
                const blob = new Blob([codeStr], { type: 'text/plain;charset=utf-8' })
                saveAs(blob, data.fileName)
            },
            execCopy(data) {
                document.getElementById('copyNode').click()
            },
            empty() {
                this.$confirm('确定要清空所有组件吗？', '提示', { type: 'warning' }).then(
                    () => {
                        this.drawingList = []
                        this.idGlobal = 100
                    }
                )
            },
            drawingItemCopy(item, parent) {
                let clone = JSON.parse(JSON.stringify(item))
                clone = this.createIdAndKey(clone)
                parent.push(clone)
                this.activeFormItem(clone)
            },
            createIdAndKey(item) {
                const config = item.__config__
                config.formId = ++this.idGlobal
                config.renderKey = +new Date()
                if (config.layout === 'colFormItem') {
                    item.__vModel__ = `field${this.idGlobal}`
                } else if (config.layout === 'rowFormItem') {
                    config.componentName = `row${this.idGlobal}`
                }
                if (Array.isArray(config.children)) {
                    config.children = config.children.map(childItem => this.createIdAndKey(childItem))
                }
                return item
            },
            drawingItemDelete(index, parent) {
                parent.splice(index, 1)
                this.$nextTick(() => {
                    const len = this.drawingList.length
                    if (len) {
                        this.activeFormItem(this.drawingList[len - 1])
                    }
                })
            },
            generateCode() {
                const { type } = this.generateConf
                this.AssembleFormData()
                const script = vueScript(makeUpJs(this.formData, type))
                const html = vueTemplate(makeUpHtml(this.formData, type))
                const css = cssStyle(makeUpCss(this.formData))
                return beautifier.html(html + script + css, beautifierConf.html)
            },
            showJson() {
                this.AssembleFormData()
                this.jsonDrawerVisible = true
            },
            download() {
                this.dialogVisible = true
                this.showFileName = true
                this.operationType = 'download'
            },
            run() {
                this.dialogVisible = true
                this.showFileName = false
                this.operationType = 'run'
            },
            copy() {
                this.dialogVisible = true
                this.showFileName = false
                this.operationType = 'copy'
            },
            tagChange(newTag) {
                newTag = this.cloneComponent(newTag)
                const config = newTag.__config__
                newTag.__vModel__ = this.activeData.__vModel__
                config.formId = this.activeId
                config.span = this.activeData.__config__.span
                this.activeData.__config__.tag = config.tag
                this.activeData.__config__.tagIcon = config.tagIcon
                this.activeData.__config__.document = config.document
                if (typeof this.activeData.__config__.defaultValue === typeof config.defaultValue) {
                    config.defaultValue = this.activeData.__config__.defaultValue
                }
                Object.keys(newTag).forEach(key => {
                    if (this.activeData[key] !== undefined) {
                        newTag[key] = this.activeData[key]
                    }
                })
                this.activeData = newTag
                this.updateDrawingList(newTag, this.drawingList)
            },
            updateDrawingList(newTag, list) {
                const index = list.findIndex(item => item.__config__.formId === this.activeId)
                if (index > -1) {
                    list.splice(index, 1, newTag)
                } else {
                    list.forEach(item => {
                        if (Array.isArray(item.__config__.children)) this.updateDrawingList(newTag, item.__config__.children)
                    })
                }
            },
            refreshJson(data) {
                debugger;
                this.drawingList = JSON.parse(JSON.stringify(data.fields))
                delete data.fields
                this.formConf = data
            }
        }
    }
</script>

<style lang='scss'>
    @import './designFormTools/styles/home';
</style>
